I have come to discover a weird thing with my MBA (1.8 SSD). Bascially, any video application heats the machine up like a rocket. I never get a core shutdown, but video will get quite choppy. When I use Safari for video (youtube stuff, wmv format video with Flip4Mac, etc), the machine heats up and the video gets choppy. If I quit and reboot Safari, the temp cools right down. If I don't quit Safari, the MBA never cools down--even if I don't use Safari again (IOW, the Safari app is open, but no Safari windows are open). If Safari heats up my MBA, and I put it to sleep, the MBA will cool down. But upon waking from sleep, it will heat up again and stay hot--even it I don't touch Safari again. I can use Safari for hours and my MBA stays nice and cool--as long as I don't watch any video. Other video apps will heat up my MBA, but it always cools down once I stop watching video, even if I keep the apps open. (BTW, I'm using Safari 3.1. I haven't tried going back to 3.0.4 yet) I don't know what's going on, but this is becoming a giant PITA.